AS CISPR 11:2017 pdf free.Industrial, scientific and medical equipment – Radio-frequency disturbance characteristics – Limits and methods of measurement (CISPR 11:201 5+AMD1:2016 (ED.6.1) MOD).
5 Classification of equipment
5.1 Separation into groups
In order to simplify identification of the relevant limits, equipment in the scope of this standard is categorized into two groups, i.e. into group 1 and group 2.
Group 1 equipment: group 1 contains all equipment in the scope of this standard which is not classified as group 2 equipment.
Group 2 equipment: group 2 contains all ISM RF equipment in which radio-frequency energy in the frequency range 9 kHz to 400 GHz is intentionally generated and used or only used locally, in the form of electromagnetic radiation, inductive and/or capacitive coupling, for the treatment of material, for inspection/analysis purposes, or for transfer of electromagnetic energy.
NOTE See Annex A for examples of the separation of equipment into group 1 or 2.
5.2 DivisIon into classes
In accordance with the intended use of equipment in the electromagnetic environment, this standard defines two classes of equipment, namely class A and class B.
Class A equipment is equipment suitable for use in all locations other than those allocated in residential environments and those directly connected to a low voltage power supply network which supplies buildings used for domestic purposes.
Class A equipment shall meet class A limits.
Arc welding equipment which contains arc striking or stabilizing devices and stand-alone arc striking or stabilizing devices for arc welding shall be classified as class A equipment.
Class B equipment is equipment suitable for use in locations in residential environments and in establishments directly connected to a low voltage power supply network which supplies buildings used for domestic purposes.
Class B equipment shall meet class B limits.
5.3 Documentation for the user
The manufacturer and/or supplier of equipment shall ensure that the user is informed about the class and group of the equipment, either by labelling or by the accompanying documentation. In both cases the manufacturer/supplier shall explain the meaning of both the class and the group in the documentation accompanying the equipment.
The documentation accompanying the equipment shall contain details of any precautions to be observed by the purchaser or user to ensure that regular operation and use of the equipment in the field does not cause harmful radio frequency interference (RFI). In the framework of this standard, these details concern information about:
• the possibility of radio frequency interference originating from operation of class A equipment in certain environments,
• special precautions to be observed when connecting class A equipment to a low voltage power supply network, see Footnote a and b in Table 2, Footnote b in Table 3 and Footnote a in Table 6, respectively,
• measures which can be taken at installation level to reduce emissions from installed class A equipment, see Footnote b in Table 2 and Footnote a in Table 8.
For class A equipment, the instructions for use accompanying the product shall contain the following text:
Caution: This equipment is not intended for use in residential environments and may not provide adequate protection to radio reception in such environments.
6 Limits of electromagnetic disturbances
6.1 General
For measurements at standardized test sites, the requirements specified hereafter constitute the requirements for type tests.
Class A equipment may be measured either on a test site or in situ as preferred by the manufacturer.
NOTE 1 Due to size, complexity or operating conditions some equipment may have to be measured in situ in order to show complianc, with the radiation disturbance limits specified herein.
Class B equipment shall be measured on a test site.
NOTE 2 The limits have been determined on a probabilistic basis taking into account the likelihood of interference. In cases of interlerence, additional provisions may have to be applied.
The lower limit shall apply at all transition frequencies.
Measuring apparatus and methods of measurement are specified in Clauses 7, 8 and 9.AS CISPR 11 pdf download.